NextGEN displays an “HTTP Error” message (no other details) when using the Flash-based uploader with NextGEN 1.9.1 and WP 3.3. The problem occurs whether using drag-and-drop or the “Select Files” button. Images can still be uploaded if I “Disable flash upload,” but there goes the cool new drag-and-drop.

When the site was running NextGEN 1.8.4 and WP 3.2.1, the Flash uploader worked fine. It’s only broken since the upgrade.

And an odd thing: the HTTP error occurs only after the image has been 65% uploaded. (I am testing with images less than 20k, so it’s not a size issue.)

NextGEN 1.9.1 is the version that was developed to be compatible with WP 3.3. Guess it isn’t fully compatible yet. I was hoping there was a workaround or that enough people would be having this problem to prompt a fix,

Alex, I am having the same exact issues. Same exact set of tests. The upload shows that it has finished and in the dialog box just below the upload percent bar it shows HTTP 500 error.

I too have tested it on several machines and several configurations. The core uploader works fine. I wondered if it could be something to do with another plugin conflict. I run nextgen on 5 other sites and they are all upgraded to 3.3 and 1.9.1 and they have no issues with the flash uploader.

ADWheeler, we do have some slight differences in our problems. My error just shows “HTTP Error,” it doesn’t have a number (500 in your case). And my upload does not show that it has finished; it says “0 files uploaded” and indicates a failure.